cd catkin_ws/src
git clone https://github.com/ola31/drok3_description.git
git clone https://github.com/ola31/cmdvel_to_cmdvel2.git
git clone https://github.com/ros-perception/laser_filters.git
cd ~/catkin_ws
catkin build drok3_description2 cmdvel_to_cmdvel2 laser_filters
sudo apt-get install ros-melodic-gmapping
ROS 버전에 따라서 melodic 대신 kinetic, noetic 등을 넣어서 설치
roslaunch drok3_description2 gazebo.launch
roslaunch drok3_description2 gazebo.launch
roslaunch drok3_description2 display.launch
rosrun gmapping slam_gmapping scan:=scan_filtered
gedit ~/.bashrc
ㄴ export GAZEBO_MODEL_PATH=~/catkin_ws/src/drok3_description/world (추가)
ㄴ 저장
source ~/.bashrc